Feature: Add customer reviews system with admin management

- Add Review model to database with approval workflow
- Customers can submit reviews with 1-5 star ratings
- Admin can approve, reject, or delete reviews
- Public reviews page showing all approved reviews with rating stats
- ReviewForm component for easy integration on product pages
- Bulk gallery upload now properly tracked

Chore: Add expected delivery date for design approvals

- Add expectedDeliveryDate field to DesignApproval model
- Admin can set delivery date when approving designs
- Improves customer communication and expectations

Chore: Add welcome back message for logged-in customers

- Display personalized greeting on account page after login
- Shows customer's name if available

Chore: Add color difference disclaimer to product pages

- Added to StandardProductView (ready-made products)
- Added to DesignCanvas (personalized products)
- Informs customers about lighting-based color variations
- Helps manage customer expectations

Feature: Add image identification in design specifications

- Images now clearly labeled as "Image 1", "Image 2", etc.
- Images marked with purple circles in specification diagrams
- Improves clarity for production team

Documentation: Add comprehensive database optimization guide

- DATABASE_OPTIMIZATION.md - Full optimization strategies
- DATABASE_OPTIMIZATION_QUICK_START.md - Implementation examples
- DATABASE_OPTIMIZATION_MIGRATION.sql - Ready-to-run indexes
- Covers indexing, pagination, caching, and monitoring

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

DATABASE_OPTIMIZATION_MIGRATION.sql

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+-- Database Performance Optimization Indexes
+-- Run this directly on PostgreSQL or use: npx prisma db execute --stdin < DATABASE_OPTIMIZATION_MIGRATION.sql
+
+-- Order indexes
+CREATE INDEX IF NOT EXISTS idx_order_customer_created ON "Order"("customerId", "createdAt" DESC);
+CREATE INDEX IF NOT EXISTS idx_order_status_created ON "Order"("status", "createdAt" DESC);
+CREATE INDEX IF NOT EXISTS idx_order_email ON "Order"("email");
+
+-- OrderItem indexes
+CREATE INDEX IF NOT EXISTS idx_order_item_order_product ON "OrderItem"("orderId", "productId");
+CREATE INDEX IF NOT EXISTS idx_order_item_product ON "OrderItem"("productId");
+
+-- DesignApproval indexes
+CREATE INDEX IF NOT EXISTS idx_design_approval_email_status ON "DesignApproval"("customerEmail", "status");
+CREATE INDEX IF NOT EXISTS idx_design_approval_status_created ON "DesignApproval"("status", "createdAt" DESC);
+CREATE INDEX IF NOT EXISTS idx_design_approval_product ON "DesignApproval"("productId");
+
+-- Review indexes
+CREATE INDEX IF NOT EXISTS idx_review_product_approved ON "Review"("productId", "approved");
+CREATE INDEX IF NOT EXISTS idx_review_customer ON "Review"("customerId");
+
+-- Product indexes
+CREATE INDEX IF NOT EXISTS idx_product_category_visible ON "Product"("category", "showOnProducts");
+CREATE INDEX IF NOT EXISTS idx_product_personalised ON "Product"("showOnPersonalised");
+
+-- DesignProof indexes
+CREATE INDEX IF NOT EXISTS idx_design_proof_status ON "DesignProof"("status", "createdAt" DESC);
+
+-- Message indexes
+CREATE INDEX IF NOT EXISTS idx_message_proof ON "Message"("proofId", "createdAt");
+
+-- Customer indexes
+CREATE INDEX IF NOT EXISTS idx_customer_email ON "Customer"("email");
+
+-- Gallery Photo indexes
+CREATE INDEX IF NOT EXISTS idx_gallery_photo_approved ON "GalleryPhoto"("approved", "createdAt" DESC);
+
+-- Optimize query planner statistics
+ANALYZE;